Hollow oenameftal metallic bodies



(No Model.)

J. BURKHARD? DIE FOR FORMING HOLLOW ORNAMENTAL METALLIC BODIES.

No. 378,413. Patented Feb.21, 1888.

UNITED STATES PATnnT rrinn, 3

JOHN BURKHARDT, OF NEYV YORK, N. Y., ASSIGNOR OF ONE'HALF TO WILLIAM H.JACKSON 83 00., OF SAME PLACE.

DlES FOR FORMING HOLLOW ORNAMENTAL METALLIC B ODlES.

SPECIFICATION forming part of Letters Patent N 0. 378,413, datedFebruary 21; 1888.

Application filed January 3, 1587. Serial No. 223,209. (No model.)

To all whom, it may concern:

Be it known that I, JOHN BURKHARIDT, a citizen of the United States,residing at New York, in the county and State of New York, have inventednew and useful Improvements in Mechanism for Making Parts of OrnamentalMetallic Rails, Balusters, Posts, and Similar Articles from Tubing; andI do hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,making part of this specification, in which-- Figure 1 represents aperspective view of a pair of former-plates used for operating upon apiece of tubing, such as is shown in position at d ready to be reducedto the desired form. Fig. 2 is a similar view of the same with thesection of tubing after having been reduced to the undulating shapesuitable for ornamental balusters or posts. Fig. 3 represents aperspective view of a portion of netting of fine elastic steel wire,which for the purpose of surface ornamentation will be laid upon theundulating face of plate a, for the purpose of impressing its figure ordesign upon the baluster or other article formed by being passed betweenthe converging plates at b.

The object of this invention, as will now appear, is to produce theabove-named class of articles from metal tubing with varied surfaceembellishments in an expeditious and simple manner. Balusters andanalogous articles may by these means he made of tubing or rolled metalof suitable temper and pliability to sustain the action of the machineryand to receive the embellishing imprint as described. It is apparentthat wire-netting or other thin hard elastic material formed torepresent any particular figure or design in relief maybe em- 40 ployedin the manner specified for surface embellishment of these products.

The plates at 5, instead of being made with parallel corrugations orribs, may be made with diverging or spirall y-arranged ribs or grooves,whereby such different configurations would be impressed into thesurface of the tubing as it passed between said plates.

The operation of converting tubing to the ornamental shapes mentionedand shown at cl by the mechanism described may be eifected by the use ofa metal-planing machine, the bedplate a being secured upon the table orframe of such machine, and the traversing plate b being secured to thetool holder or clutch of the machine by means of the bridge-block c, andas the plates are formed as inclined planes upon their working-faces thespace between them is convergent, narrowing from the place ofintroduction of the section of tubing (1 to the place of discharge ofthe formed baluster at d. The movement of the former-plate I) over thebed-plate a, the tube 01 being between them, will gradually reduce thetube to the shape corresponding to the form of the working-faces of theplates without causing injury to or fracturing the article formed.

Having fully described my invention, what I claim therein, and desire tosecure by Letters Patent, is

The hard metal netting or its equivalent jointly with the corrugatedconverging formerplates a b, for embellishing the ornamental hollowbalusters, posts, or rails, in the manner described.

J OHN BURKHARDT.

Vitnesses:

H. P. K. PEOK, GEORGE MoHUeH, FRED. It. LAWRENCE.

